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Assessment of electrical power quality parameters in an industrial electrical system
No full textThis paper evaluates the characteristic parameters of the permanent regime of power quality in an electrical system within a service industry focused on metal-mechanic engineering solutions, encompassing the design, manufacture, and repair of structural components for mining equipment. The significance of this study arises from the escalating power quality issues attributed to the company's technological processes heavily reliant on non-linear electrical loads. The investigation encompasses a comprehensive survey of the company, delineating and contrasting the measured and computed variables against acceptable thresholds stipulated by prevailing regulations. The measurements and analyses were conducted on a 3000 kVA PCC transformer with a designated voltage of 13.8 kV/460 V and ten transformers with capacities ranging from 10 kVA to 250 kVA, catering to individual circuits. Within the scope of the study, challenges pertaining to voltage fluctuations, current imbalances, and current harmonic distortions emerged in nine out of the ten individual circuit transformers, whereas the PCC exhibited no discernible issues concerning the quality of electrical power. The outcomes underscore that within an industrial electrical system, there exists the possibility that the quality parameters of electrical power align with normative thresholds at the PCC level. However, such conformity may not extend to individual circuits, potentially giving rise to power quality complications, subsequently curtailing the operational lifespan of equipment, and inducing energy losses within the industrial setting
Evaluation of the transparency in the websites of the mayoralties of the Colombian Caribbean
No full textLa transparencia en la administración pública es un tema central en el desarrollo de la democracia contemporánea, pues gobernar sin informar adecuadamente deslegitima la gestión de recursos públicos y disminuye la confianza de la ciudadanía hacia sus gobernantes. Por lo anterior el objetivo de este trabajo es reconocer cómo las websites de las alcaldías de la costa caribe colombiana promueven valores asociados a la transparencia, el open government y la participación ciudadana. Para ello se evaluaron las websites de las alcaldías empleando la metodología Infoparticipa, una metodología creada para promover el ejercicio de los derechos ciudadanos y que ha sido empleada en España, Ecuador, Chile, entre otros. Los hallazgos refuerzan la idea de que las websites son herramientas fundamentales para promover la participación ciudadana y que pueda realizar control a la gestión pública siempre y cuando la información sea de calidad y esté disponible. La democracia participativa requiere de ciudadanías de alta intensidad y esto es posible si las administraciones comparten toda la información que por Ley están obligadas a compartir a la ciudadanía en general.Transparency in public administration is a central issue in the development of contemporary democracy, since governing without adequate information delegitimizes the management of public resources and decreases the trust of citizens towards their rulers. Therefore, the objective of this work is to recognize how the websites of the municipalities of the Colombian Caribbean coast promote values associated with transparency, open government, and citizen participation. For this, the websites of the mayors’ offices were evaluated using the Infoparticipa methodology, a methodology created to promote the exercise of citizen rights and that has been used in Spain, Ecuador, Chile, among others. The findings reinforce the idea that websites are fundamental tools to promote citizen participation and that they can control public management if the information is of quality and available. Participatory democracy requires high-intensity citizenship, and this is possible if the administrations share all the information that by law they are obliged to share with the public
Cost systems present in credit unions in the city of Barranquilla in the 4.0 era.
No full textThe present study is aimed at characterizing the Cost Systems present in Savings and Credit Cooperatives in the city of Barranquilla in the 4.0 era. The research design was oriented towards the non-experimental causal correlational and the population was constituted by the savings and credit cooperatives belonging to the city of Barranquilla, which were selected through simple random probability sampling to then apply the primary information collection instrument through a Likert style survey. These types of organizations immersed in the Colombian third sector generally lack cost systems that provide them with the necessary tools to support the decision-making process executed by the administrative bodies immersed in them, such as the General Assembly, the Board of Directors, the Management, the Accounting Department, and the Statutory Auditor's Office. The savings and credit cooperatives in the city of Barranquilla have very archaic accounting systems related to the costs of the products and services rendered to the society, which have great difficulties at the time of basing the financial decision making process
Beyond Populism and Plutocracy: Aretecracy as a New Democratic Paradigm
No full textLa Aretecracia se presenta como una alternativa a los actuales modelos democráticos, enfrentando las problemáticas contemporáneas del populismo y la plutocracia.El propósito de este estudio es analizar el potencial de la Aretecracia como un paradigma de gobernanza basado en la virtud y la ética, proponiendo un marco de respuesta a las crisis éticas y estructurales de las democracias actuales. Metodológicamente, se adopta un enfoque teórico-analítico, revisando críticamente la literatura existente sobre teoría democrática y aplicando estos conceptos al diseño de un sistema de pre-calificación ética para los líderes políticos. Los resultados muestran que la Aretecracia puede ofrecer un modelo viable de gobernanza al integrar criterios éticos en los procesos de selección de líderes, asegurando que aquellos que ocupen cargos públicos sean moralmente competentes y técnicamente calificados. Además, el estudio explora cómo la Aretecracia podría ser implementada en diversos contextos sociopolíticos, fomentando una cultura política basada en la excelencia y la integridad. Las conclusiones subrayan la necesidad de reformar los sistemas democráticos actuales, incorporando mecanismos de pre-calificación ética para fortalecer la legitimidad y eficiencia de los gobiernos, garantizando que las decisiones políticas estén alineadas con el bienestar colectivo y los derechos humanos.
Aretecracy is presented as an alternative to the current democratic models, facing the contemporary problems of populism and plutocracy. The purpose of this study is to analyze the potential of Aretecracy as a governance paradigm based on virtue and ethics, proposing a framework to respond to the ethical and structural crises facing modern democracies. Methodologically, a theoretical-analytical approach is adopted, critically reviewing existing literature on democratic theory and applying these concepts to the design of an ethical pre-qualification system for political leaders. The results demonstrate that Aretecracy can offer a viable governance model by integrating ethical criteria into the leader selection process, ensuring that those who hold public office are both morally competent and technically qualified. Furthermore, the study explores how Aretecracy could be implemented in various sociopolitical contexts, fostering a political culture based on excellence and integrity. The conclusions emphasize the need to reform current democratic systems by incorporating mechanisms of ethical pre-qualification to strengthen the legitimacy and efficiency of governments, ensuring that political decisions align with the collective well-being and human rights.
A hybrid MOO/MCDM optimization approach to improve decision-making in multiobjective optimization
No full textMultiobjective optimization (MOO) and multicriteria decision-making (MCDM) are critical disciplines in operations research, aiming to assist decision-makers in making the best decisions in complex problems. Nevertheless, the hybridization of the process has yet to be explored. In this case, the hybridization of the decision process is analyzed to evaluate the solution set obtained with this approach and compare it against the solutions obtained with Pareto Set. This novel approach shows that according to the decision-maker preferences, solutions could be in this solution set despite not being included in the Pareto Set. This approach gives alternatives to decision-makers without moving apart much from the best solution. A flow shop is used as a numerical example to compare the Pareto Set and hybrid approach outcomes
A hybrid multi-criteria framework for evaluating the performance of clinical labs during the Covid-19 pandemic
No full textClinical laboratories were affected by the recent Covid-19 pandemic, evidencing the low preparedness of some clinical labs when responding to seasonal diseases, epidemics/pandemics, and other disastrous events. However, various operational shortcomings become glaring in the labs also propelled by the virus’s ever-changing dynamics and rapid evolution. Therefore, this paper presents a novel hybrid intuitionistic Multi-criteria Decision-Making (MCDM) approach to evaluate the performance of clinical labs during the Covid-19 pandemic. First, we used Intuitionistic Fuzzy Analytic Hierarchy Process (IF-AHP) to estimate the relative weights of criteria and sub-criteria considering hesitancy and uncertainty properties. Second, we employed Intuitionistic Fuzzy Decision Making Trial and Evaluation Laboratory (IF-DEMATEL) to evaluate the interrelationships among performance criteria as often found in the healthcare context. Ultimately, the Combined Compromise Solution (CoCoSo) technique was applied to estimate the Performance Index (PI) of each clinical laboratory and pinpoint the main weaknesses hindering the effective response in presence of the Covid-19 and other disastrous events. This approach was validated in 9 clinical labs located in a Colombian region. The results evidenced that Operating capacity (global weight = 0.1985) and Occupational health and safety (global weight = 0.1924) are the most important aspects for increasing the overall response of the labs against new Covid-19 waves and future outbreaks. Besides, operating capacity (D + R = 37.486) and Equipment (D + R = 38.024) were concluded to be the main performance drivers. Also some clinical labs uncovered major shortcomings that may restrict their functioning in a future contingency
Finger minutiae extraction based on the use of YOLO-V5
No full textIn this study, we propose a novel method for detecting minutiae in fingerprint images using YOLOv5, a state-of-the-art object detection algorithm. Our approach utilizes a convolutional neural network (CNN) to identify and locate minutiae points, such as ridge endings and bifurcations, within a fingerprint image. We trained the CNN on a dataset of fingerprint images and corresponding minutiae annotations, and evaluated its performance using standard metrics such as precision, recall, mAP 0.5 and mAP 0.5:0.95. Our results indicate that the proposed method is able to accurately detect minutiae in fingerprint images with high precision - 91%, recall - 82%, mAP 0.5 - 89% and mAP 0.5:0.95 - 39%. Furthermore, we demonstrate that the YOLOv5-based approach is significantly faster than traditional minutiae detection methods, making it suitable for real-time applications. In conclusion, this study presents a promising approach for the automated detection of minutiae in fingerprint images using YOLOv5
VI Concurso Nacional de Microcuento 2023
No full text6ta ediciónLa Biblioteca de la Universidad de la Costa, orgullosamente presenta la quinta sexta de nuestro concurso nacional de microcuento, donde autores colombianos podrán dejar volar su imaginación. Este año, apostando por la internacionalización de nuestra biblioteca, invitamos a postular obras en idioma castellano e inglés
Neuropsychological effects and cognitive deficits associated with exposure to mercury and arsenic in children and adolescents of the Mojana region, Colombia
No full textThe present study aims to explore the neuropsychological performance and exposure to mercury (Hg) and arsenic (As) in Colombian children and adolescents considering biomarkers in hair and blood. The total sample consisted of 70 participants from the Mojana region, Colombia. A neuropsychological evaluation protocol was used, consisting of 11 internationally recognized tests, with evidence of national validation and use for measurement in neurotoxicology contexts. A 57.1% of the sample presented levels above the reference value according to the USEPA, the WHO, and the ATSDR for total mercury in hair (HgH), blood mercury (HgB), and/or blood arsenic (AsB). The mean values reported for HgH were 1.76 ± 3.1 μg/g (95% CI 1.02–2.50) with ranges between 0.23 and 17.20; for HgB: 4.11 ± 5.93 μg/l (CI 2.69–5.52), ranging between 0.25 and 25.80, and for AsB: 1.96 ± 2.73 (CI 1.31–2.61) ranging between 0.50 and 15.50. In the comparison of groups in relation to the level of exposure, a significant difference was found (p < 0.05) for the subtest The Boston Naming Test (BNT). Correlation analyses found, on the one hand, significant negative relationships in tests integrated within the verbal (CVB) and executive function (EF) components as well as evidence of positive relationships in the manifestation of errors in their performance with the levels of Hg and/or As transformed by biomarker (Log10). In the linear regression analyses it was found that for each increase in the concentration of HgH, HgB, and AsB it is estimated that, both for the models with and without data adjustment, there is a loss of scores in integrated measures within the CVB and EF for the transformed levels of HgH, HgB, and AsB; and an increase in the reported errors in their processing within these functions. According to these results, exposure to mercury and/or arsenic is related with performance in verbal neuropsychological skills and executive functioning
A universal model of three-phase asynchronous motors for electrical power system analysis
No full textThe high incidence of three-phase asynchronous motors (TAM) in global energy consumption and its influence on the operation of electrical systems makes it necessary to develop models that allow their analysis effectively. Based on this, this paper presents a universal model of TAM based on the relationship between the active and reactive power of the TAM and the deviation of voltage and frequency. It can be applied to any general-purpose TAM and is very useful when representing these motors in electrical power system studies. The model parameters were obtained from a statistical analysis performed on 70 TAM of different classifications. The results are validated by comparing them with those obtained from the solution of the equivalent circuit, demonstrating its validity by less than 6% errors